I wonder how this will be portrayed in DoS? I have the following thoughts. Although it works fine in the book, I somehow can't see PJ been happy with the party just been hungry as a reason to stray of the path. Not dramatic enough for the moviegoer. So, I expect - There won't be a magic path at all, they might just get attacked in Mirkwood. There will be a path, but it won't be a magic one. Or if there is a path and it is a magic one, just starving will not be a reason for the party to stray of it! Maybe attacked again by Azog's wrags?

Get attacked by the Spiders, making lots of noise, which capture the attention of the Elves. I can't imagine there will be any outdoor feasts or straying off the track. Why have an outdoor feast anyway, when the forest is covered in Spiders and other beasts?

From the concept art in the DOS live preview event, it looks like they've also gotten rid of the boat crossing across the Enchanted River. Instead of using the boat to cross the river, it looks like they have to jump across a broken bridge.

With so much drama following their straying off the path...
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...I'm not sure the actual act off straying of the path needs to be fueled by drama. Can't they just end up in a dramatic spot purely on their own accord, for the mistake of not heeding Gandalf's advice?

Besides, if written well, the company reaching the decision to stray off the path could by itself actually serve as drama (pure dialogue can be dramatic, too, as the LOTR-trilogy showed many a time), without outside forces interfering; Some members of the company might argue staying, others might argue leaving it (Bilbo either protesting based on what Gandalf said, or just trying to avoid it all), and because of the dire situation, tensions start to flare, forcing Thorin to dramatically step in and take command. Eventually, they decide to stray, which turns out to be a mistake, leading to an even more dramatic situation.